Temporal and spatial variations of phosphorus losses and drainage in a structured clay soil

Sammanfattning

Drainage discharge and loss of dissolved (PO4-P)and particulate (part-P) P from four artificially drained plots with clay soils were studied over a four-year period. The loads of total P observed during this time ranged from 421 g P ha(-1) to 805 g P ha(-1). Annual losses and losses during high-flow events were measured. Leaching of P occurred episodically with the largest losses during high-flow events. Concentrations of PO4-P during high-how events were positively related to discharge rates and the curves obtained were grouped into two classes based on similar slopes within the class. Concentrations of part-P were related to concentrations of suspended soil material, and increased with increasing discharge rate, but the slope of the curves obtained varied over a wide range. High P concentrations were observed in high-flow episodes which occurred after P fertilizer applications. (C) 2000 Elsevier Science Ltd. All rights reserved.

Nyckelord

drainage discharge; dissolved phosphorus; particulate phosphorus; suspended material

Publicerad i

Water Research
2000, Volym: 34, nummer: 5, sidor: 1687-1695

SLU författare

• Djodjic, Faruk

  • Institutionen för markvetenskap, Sveriges lantbruksuniversitet
    

• Ulen, Barbro

  • Institutionen för markvetenskap, Sveriges lantbruksuniversitet
    

• Bergström, Lars

  • Institutionen för markvetenskap, Sveriges lantbruksuniversitet
    

Associerade SLU-program

Jordbrukslandskap


UKÄ forskningsämne

Miljövetenskap


Publikationens identifierare

DOI: https://doi.org/10.1016/S0043-1354(99)00312-7

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/84975